From: Mike Hommey <mh@glandium.org>
Date: Sat, 27 Nov 2021 06:49:44 +0900
Subject: Fix math_private.h for i386 FTBFS

Cherry picked from firefox.
---
 modules/fdlibm/src/math_private.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/fdlibm/src/math_private.h b/modules/fdlibm/src/math_private.h
index f4373f2..632d2c4 100644
--- a/modules/fdlibm/src/math_private.h
+++ b/modules/fdlibm/src/math_private.h
@@ -30,7 +30,11 @@
  * Adapted from https://github.com/freebsd/freebsd-src/search?q=__double_t
  */
 
+#if defined __FLT_EVAL_METHOD__ && (__FLT_EVAL_METHOD__ == 2)
+typedef long double      __double_t;
+#else
 typedef double      __double_t;
+#endif
 typedef __double_t  double_t;
 typedef float       __float_t;